Totally closed
Wide open
Semi closed
Semi open
U, V, W and N
A, B, C and N
1, 2, 3 and 4
X, Y, Z, N
120 Degree
90 Degree
360 Degree
180 Degree
Smooth cylindrical
Salient pole
Projecting pole
Squirrel cage
DC shunt generator
Rectifier
DC series generator
Battery